// Copyright 2013 Tumblr, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// vena-front-start is a command-line executable that launches the HTTP and OpenTSDB frontends for the Vena database
package main

import (
	_ "circuit/load/cmd"
	"circuit/use/circuit"
	"encoding/json"
	"flag"
	"fmt"
	"io/ioutil"
	"os"
	"vena"
	"vena/front"
)

var (
	flagVena  = flag.String("vena", "", "vena configuration file name")
	flagFront = flag.String("front", "", "vena front configuration file name")
)

func main() {
	flag.Parse()

	if *flagVena == "" || *flagFront == "" {
		flag.Usage()
		os.Exit(1)
	}

	// Vena config
	raw, err := ioutil.ReadFile(*flagVena)
	if err != nil {
		panic(err)
	}
	vcfg := &vena.Config{}
	if err = json.Unmarshal(raw, vcfg); err != nil {
		panic(err)
	}

	// Front config
	raw, err = ioutil.ReadFile(*flagFront)
	if err != nil {
		panic(err)
	}
	fcfg := &front.Config{}
	if err = json.Unmarshal(raw, fcfg); err != nil {
		panic(err)
	}

	println("Starting VENA front workers")
	result := front.Replenish(vcfg, fcfg)
	for _, r := range result {
		println(fmt.Sprintf("%s %#v", r.Addr, r.Err))
	}
	println("VENA front workers started successfully.")
	circuit.Hang()
}
